In a separate study, HHS finds a 40% increase in sepsis cases, as more patients succumb to infections without effective antibiotics and antimicrobial drugs
Given the drastic steps being taken to slow the spread of the Coronavirus in America, it’s easy to forget that significant numbers of patients die each year due to antibiotic-resistant bacteria (ARB), other forms of antimicrobial resistance (AMR), and in thousands of cases the sepsis that follows the infections.
The CDC’s website states that “more than 2.8 million antibiotic-resistant infections occur in the US each year, and more than 35,000 people die as a result.” And a CDC news release states, “on average, someone in the United States gets an antibiotic-resistant infection every 11 seconds and every 15 minutes someone dies.”
Those are huge numbers.
Clinical laboratory leaders and microbiologists have learned to be vigilant as it relates to dangerously infectious antimicrobial-resistant agents that can result in severe patient harm and death. Therefore, new threats identified in the CDC’s Antibiotic Resistance Threats in the United States report will be of interest.
Drug-resistant Microbes That Pose Severe Risk
The CDC has added the fungus Candida auris (C. auris) and carbapenem-resistant Acinetobacter (a bacteria that can survive for a long time on surfaces) to its list of “urgent threats” to public health, CDC said in the news release. These drug-resistant microbes are among 18 bacteria and fungi posing a greater threat to patients’ health than CDC previously estimated, Live Science reported.
In 2013, the CDC estimated that about two million people each year acquired an antibiotic-resistant (AR) infection that killed as many as 23,000. However, in 2019, the CDC reported that those numbers were low and that the number of deaths due to AR infections in 2013 was about twice that amount. During a news conference following the CDC announcement, Michael Craig (above), a Senior Adviser for the CDC’s Antibiotic Resistance Coordination and Strategy Unit said, “We knew and said [in 2013] that our estimate was conservative … and we were right,” Live Science reported. In 2019, CDC reported 2.8 million antibiotic-resistant infections annually with more than 35,000 related deaths in the US alone. (Photo copyright: Centers for Disease Control and Prevention.)
The CDC considers five threats to be urgent. Including the
latest additions, they are:
Dark Daily has regularly covered the healthcare industry’s ongoing struggle with deadly fungus and bacteria that are responsible for hospital-acquired infections (HAI) and sepsis. This latest CDC report suggests healthcare providers continue to struggle with antimicrobial-resistant agents.
Acinetobacter Threat Increases and C. auris
a New Threat since 2013
Carbapenem-resistant Acinetobacter, a bacterium that
causes pneumonia and bloodstream and urinary tract infections, escalated from
serious to urgent in 2013. About 8,500 infections and 700 deaths were noted by the
CDC in 2017.
C. auris, however, was not addressed in the 2013
report at all. “It’s a pathogen that we didn’t even know about when we wrote
our last report in 2013, and since then it’s circumvented the globe,” said Michael
Craig, Senior Adviser for the CDC’s Antibiotic Resistance Coordination and
Strategy Unit, during a news conference following the CDC announcement, Live
Science reported.
Today, C. auris is better understood. The fungus
resists emerging drugs, can result in severe infections, and can be transmitted
between patients, CDC noted.
By year-end, CDC tracking showed 988 cases in the US.
More Patients Getting Sepsis as Antibiotics Fail: HHS
Study
In a separate study published in Critical Care Medicine, a journal of the Society of Critical Care Medicine (SCCM), the US Department of Health and Human Services (HHS) found that antibiotic-resistant bacteria and fungi are resulting in more people acquiring sepsis, a life-threatening condition, according to an HHS news release.
Sepsis increased by 40% among hospitalized Medicare patients
from 2012 through 2018, HHS reported.
“These (untreatable infections) are happening here and now in the United States in large numbers. This is isn’t some developing world thing. This isn’t a threat for 2050. It’s a threat for here and now,” Cornelius “Neil” Clancy, MD, Associate Chief of Veterans Affairs Pittsburg Health System (VAPHS) and Opportunistic Pathogens, told STAT.
It is troubling to see data about so many patient deaths
related to antibiotic-resistant infections and sepsis cases when the world is
transfixed by the Coronavirus. Nevertheless, it’s important that medical laboratory
leaders and microbiologists keep track of how the US healthcare system is or is
not responding to these new infectious agents. And, to contact infection
control and environmental services colleagues to enhance surveillance, ensure
safe healthcare environments and equipment, and adopt appropriate strategies to
prevent antibiotic-resistant infections.
Thorough hand-washing protocols aren’t just for healthcare professionals anymore. Patients also need to be educated to prevent hospital-acquired infections
Microbiologists and clinical laboratory managers will be particularly interested to learn that patients are bringing deadly organisms into hospitals on their hands. That’s the conclusion of a University of Michigan (UM) study which found that as patients enter and move throughout hospitals, they deposit and spread multi-drug resistant organisms, or MDROs on clinical surfaces. When those surfaces are not properly decontaminated, the bacterial contamination spreads on contact.
This finding has implications for the nosocomial infection teams in hospitals that include microbiologists and clinical laboratories. After all, every day there is a large flow of walk-in patients and visitors who come in contact with dozens of surfaces. The potential for contamination with multi-drug resistant organisms is high.
Antibiotic-resistant bacteria have been the root cause of a marked increase in hospital-acquired infections (HAIs), which Dark Daily has covered extensively. That’s why healthcare professionals practice proper hand-washing protocols to help reduce the transmission of pathogens and curtail possible infections.
The UM study, however, suggests that patients also should be
educated on proper hand hygiene to diminish the potential spread of bacteria,
especially before making trips to the emergency room.
Between February and July of 2017, UM researchers at two
hospitals in Southeast Michigan tested 399 general medicine hospital patients
for the presence of MDROs, also known as superbugs. They swabbed the palms,
fingers, and around the nails of the patients’ dominant hands and the interior
of both nostrils.
The researchers found that 14% of the patients tested
positive for MDROs. In addition, nearly one third of high-touch objects and
surfaces in the hospital rooms tested positive for superbugs as well.
The hospital room surfaces that were swabbed for the
presence of MDROs were:
Due to the overuse of antibiotics, these types of bacteria
are often resistant to the drugs that were once used to kill them.
“Hand hygiene narrative has largely focused on physicians, nurses, and other frontline staff, and all the policies and performance measurements have centered on them, and rightfully so,” said Lona Mody, MD (above) in a press release. Mody is Professor of Internal Medicine at UM and one of the lead researchers for the study. “But our findings make an argument for addressing transmission of MDROs in a way that involves patients, too.”
Anatomy of a Hospital-Acquired Infection
The scientists tested patients and surfaces at different
stages of their hospital stays. The samples were taken on the day of admission,
days three and seven of the stays, and weekly thereafter until the patients
were discharged.
The team found that 6% of the patients who did not have
MDROs present at the beginning of their hospital stays tested positive for
superbugs at later stages of their stays. Additionally, 20% of the tested
objects and surfaces in the patients’ rooms had superbugs on them at later test
stages that were not present earlier in the hospital stays.
“This study highlights the importance of hand washing and environmental cleaning, especially within a healthcare setting where patients’ immune systems are compromised,” noted Katherine Reyes, MD, Department of Infectious Diseases, Henry Ford Hospital, in the press release. “This step is crucial not only for healthcare providers, but also for patients and their families. Germs are on our hands; you do not need to see to believe it. And they travel. When these germs are not washed off, they pass easily from person to person and objects to person and make people sick.”
Patients included in the study had to be new admissions, on
general medicine floors, and at least 18 years of age. Criteria that excluded
individuals from participation in the research included:
Being in observation status, typically after a
medical procedure;
Transfers from other hospitals;
Transfers from intensive care units;
Having cystic fibrosis (these patients have a
higher likelihood of MDRO colonization);
Receiving end-of-life care; and
Non-English speaking.
Patients who were transferred to a room on a
nonparticipating floor within the hospitals were immediately discharged from
the study.
Patients Travel Throughout Hospitals Spreading Germs
The presence of superbugs on patients or surfaces does not
automatically translate to a patient getting sick with antibiotic-resistant
bacteria. Only six of the patients in this study developed MRSA. However, all
six of those individuals tested positive for the superbug either on their hands
or on surfaces within their room.
The researchers noted that hospital patients typically do
not stay in their rooms. They are encouraged to walk throughout the hospital to
speed up the recovery process, and often are transported to other areas of
hospitals for medical tests and procedures. Patients also may be picking up
superbugs from other patients and staff members, other hospital areas, and
commonly-touched surfaces.
The UM researchers concluded in their study that “while the
burden of preventing infections has largely been borne by [healthcare
personnel], our study shows that patient hands are an important reservoir and
play a crucial role in the transmission of pathogens in acute care hospitals.
Thus, patient hand hygiene protocols should be implemented and tested for their
ability to reduce environmental contamination, pathogen transmission, and
healthcare-associated infections, as well as to increase meaningful patient
engagement in infection prevention.”
“Infection prevention is everybody’s business,” stated Mody
in the press release. “We are all in this together. No matter where you are, in
a healthcare environment or not, this study is a good reminder to clean your
hands often, using good techniques—especially before and after preparing food,
before eating food, after using a toilet, and before and after caring for
someone who is sick—to protect yourself and others.”
These
research findings should prove to be valuable for infection control teams and
microbiology laboratories in the nation’s hospitals and health systems, as well
as independent clinical laboratories, urgent care centers, and retail
healthcare clinics.
Learning
more about the transmission of infectious agents from patient to patient and
from surfaces to patients could aid in the development of new techniques and
strategies to prevent superbugs from manifesting in medical environments.
Genomic analysis of pipes and sewers leading from the National Institutes of Health Clinical Care Center in Bethesda, Md., reveals the presence of carbapenem-resistant organisms; raises concern about the presence of multi-drug-resistant bacteria previously undetected in hospital settings
If hospitals and medical laboratories are battlegrounds, then microbiologists and clinical laboratory professionals are frontline soldiers in the ongoing fight against hospital-acquired infections (HAIs) and antibiotic resistance. These warriors, armed with advanced testing and diagnostic skills, bring expertise to antimicrobial stewardship programs that help block the spread of infectious disease. In this war, however, microbiologists and medical laboratory scientists (AKA, medical technologists) also often discover and identify new and potential strains of antibiotic resistance.
Potential Source of Superbugs and Hospital-Acquired Infections
According to the mBio study, “Carbapenemase-producing organisms (CPOs) are a global concern because of the morbidity and mortality associated with these resistant Gram-negative bacteria. Horizontal plasmid transfer spreads the resistance mechanism to new bacteria, and understanding the plasmid ecology of the hospital environment can assist in the design of control strategies to prevent nosocomial infections.”
Karen Frank, MD, PhD (above), is Chief of the Microbiology Service Department at the National Institutes of Health and past-president of the Academy of Clinical Laboratory Physicians and Scientists. She suggests hospitals begin tracking the spread of the bacteria. “In the big picture, the concern is the spread of these resistant organisms worldwide, and some regions of the world are not tracking the spread of the hospital isolates.” (Photo copyright: National Institutes of Health.)
Frank’s team used Illumina’s MiSeq next-generation sequencer and single-molecule real-time (SMRT) sequencing paired with genome libraries, genomics viewers, and software to analyze the genomic DNA of more than 700 samples from the plumbing and sewers. They discovered a “potential environmental reservoir of mobile elements that may contribute to the spread of resistance genes, and increase the risk of antibiotic resistant ‘superbugs’ and difficult to treat hospital-acquired infections (HAIs).”
Genomic Sequencing Identifies Silent Threat Lurking in Sewers
Frank’s study was motivated by a 2011 outbreak of antibiotic-resistant Klebsiella pneumoniae bacteria that spread through the NIHCC via plumbing in ICU, ultimately resulting in the deaths of 11 patients. Although the hospital, like many others, had dedicated teams working to reduce environmental spread of infectious materials, overlooked sinks and pipes were eventually determined to be a disease vector.
In an NBC News report on Frank’s study, Amy Mathers, MD, Director of The Sink Lab at the University of Virginia, noted that sinks are often a locus of infection. In a study published in Applied and Environmental Microbiology, another journal of the ASM, Mathers noted that bacteria in drains form a difficult to clean biofilm that spreads to neighboring sinks through pipes. Mathers told NBC News that despite cleaning, “bacteria stayed adherent to the wall of the pipe” and even “splashed out” into the rooms with sink use.
During the 2011-2012 outbreak, David Henderson, MD, Deputy Director for Clinical Care at the NIHCC, told the LA Times of the increased need for surveillance, and predicted that clinical laboratory methods like genome sequencing “will become a critical tool for epidemiology in the future.”
Frank’s research fulfilled Henderson’s prediction and proved the importance of genomic sequencing and analysis in tracking new potential sources of infection. Frank’s team used the latest tools in genomic sequencing to identify and profile microbes found in locations ranging from internal plumbing and floor drains to sink traps and even external manhole covers outside the hospital proper. It is through that analysis that they identified the vast collection of CPOs thriving in hospital wastewater.
In an article, GenomeWeb quoted Frank’s study, noting that “Over two dozen carbapenemase gene-containing plasmids were identified in the samples considered” and CPOs turned up in nearly all 700 surveillance samples, including “all seven of the wastewater samples taken from the hospital’s intensive care unit pipes.” Although the hospital environment, including “high-touch surfaces,” remained free of similar CPOs, Frank’s team noted potential associations between patient and environmental isolates. GenomeWeb noted Frank’s findings that CPO levels were in “contrast to the low positivity rate in both the patient population and the patient-accessible environment” at NIHCC, but still held the potential for transmission to vulnerable patients.
Since carbapenems are a “last resort” antibiotic for bacteria resistant to other antibiotics, the NIHCC “reservoir” of CPOs is a frightening discovery for physicians, clinical laboratory professionals, and the patients they serve.
The high CPO environment in NIHCC wastewater has the capability to spread resistance to bacteria even without the formal introduction of antibiotics. In an interview with Healthcare Finance News, Frank indicated that lateral gene transfer via plasmids was not only possible, but likely.
“The bacteria fight with each other and plasmids can carry genes that help them survive. As part of a complex bacterial community, they can transfer the plasmids carrying resistance genes to each other,” she noted. “That lateral gene transfer means bacteria can gain resistance, even without exposure to the antibiotics.”
The discovery of this new potential “reservoir” of CPOs may mean new focused genomic work for microbiologists and clinical laboratories. The knowledge gained by the discovery of CPOs in hospital waste water and sinks offers a new target for study and research that, as Frank concludes, will “benefit healthcare facilities worldwide” and “broaden our understanding of antimicrobial resistance genes in multi-drug resistant (MDR) bacteria in the environment and hospital settings.”
In studies, the automated microbial susceptibility testing device for smartphone performed with 98.2% accuracy, meeting FDA criteria
Imagine doing antimicrobial susceptibility testing outside a clinical laboratory. That’s the goal of researchers on the West Coast who are developing a smartphone-based diagnostic device with the capability of performing this type of point-of-care testing (POCT).
This new mobile POCT device is under development at the University of California-Los Angeles (UCLA). It promises to bring antimicrobial susceptibility testing—a routine procedure in the most medical laboratories—to remote, resource-limited areas of the world.
Even as the nation’s hospitals embark on efforts to implement effective antimicrobial stewardship programs, researchers continue to seek solutions to the same problem. They are following several paths to combat the growing resistance certain pathogens have to antibiotics. In particular, two approaches are interesting for pathologists and medical laboratory personnel. One involves understanding the processes that lead to antibiotic resistance. The other is to identify useful biomarkers associated with specific strains of pathogens. (more…)
